Smith's Bible Dictionary (1863)
(abundance of people), son of David, born to him in Hebron, and distinctly specified as the sixth, and as the child of Eglah, David’s wife. (2 Samuel 3:5; 1 Chronicles 3:3)
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
ITH'REAM (residue of the people), a son of David, born at Hebron. 2 Sam 3:5; 1 Chr 3:3.
Hitchcock's Bible Names (1869)
excellence of the people